curl --request POST \
  --url https://api.metatext.ai/v2/extract/{project_id} \
  --header 'Content-Type: application/json' \
  --data '{
  "text": "<string>",
  "model": "<string>",
  "options": {
    "refresh": false,
    "version": "<string>"
  }
}'

{
  "predictions": [],
  "metadata": {
    "language": "<string>",
    "systime": 123,
    "labels": [
      "<any>"
    ]
  }
}